cros_usbpd-charger.c 19 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Power supply driver for ChromeOS EC based USB PD Charger.
  4. *
  5. * Copyright (c) 2014 - 2018 Google, Inc
  6. */
  7. #include <linux/module.h>
  8. #include <linux/platform_data/cros_ec_commands.h>
  9. #include <linux/platform_data/cros_ec_proto.h>
  10. #include <linux/platform_data/cros_usbpd_notify.h>
  11. #include <linux/platform_device.h>
  12. #include <linux/power_supply.h>
  13. #include <linux/slab.h>
  14. #define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d"
  15. #define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER"
  16. #define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \
  17. sizeof(CHARGER_DEDICATED_DIR_NAME) ? \
  18. sizeof(CHARGER_USBPD_DIR_NAME) : \
  19. sizeof(CHARGER_DEDICATED_DIR_NAME))
  20. #define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
  21. #define CHARGER_MANUFACTURER_MODEL_LENGTH 32
  22. #define DRV_NAME "cros-usbpd-charger"
  23. struct port_data {
  24. int port_number;
  25. char name[CHARGER_DIR_NAME_LENGTH];
  26. char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH];
  27. char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH];
  28. struct power_supply *psy;
  29. struct power_supply_desc psy_desc;
  30. int psy_usb_type;
  31. int psy_online;
  32. int psy_status;
  33. int psy_current_max;
  34. int psy_voltage_max_design;
  35. int psy_voltage_now;
  36. int psy_power_max;
  37. struct charger_data *charger;
  38. unsigned long last_update;
  39. };
  40. struct charger_data {
  41. struct device *dev;
  42. struct cros_ec_dev *ec_dev;
  43. struct cros_ec_device *ec_device;
  44. int num_charger_ports;
  45. int num_usbpd_ports;
  46. int num_registered_psy;
  47. struct port_data *ports[EC_USB_PD_MAX_PORTS];
  48. struct notifier_block notifier;
  49. };
  50. static enum power_supply_property cros_usbpd_charger_props[] = {
  51. POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
  52. POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
  53. POWER_SUPPLY_PROP_ONLINE,
  54. POWER_SUPPLY_PROP_STATUS,
  55. POWER_SUPPLY_PROP_CURRENT_MAX,
  56. POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
  57. POWER_SUPPLY_PROP_VOLTAGE_NOW,
  58. POWER_SUPPLY_PROP_MODEL_NAME,
  59. POWER_SUPPLY_PROP_MANUFACTURER,
  60. POWER_SUPPLY_PROP_USB_TYPE
  61. };
  62. static enum power_supply_property cros_usbpd_dedicated_charger_props[] = {
  63. POWER_SUPPLY_PROP_ONLINE,
  64. POWER_SUPPLY_PROP_STATUS,
  65. POWER_SUPPLY_PROP_VOLTAGE_NOW,
  66. };
  67. static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = {
  68. POWER_SUPPLY_USB_TYPE_UNKNOWN,
  69. POWER_SUPPLY_USB_TYPE_SDP,
  70. POWER_SUPPLY_USB_TYPE_DCP,
  71. POWER_SUPPLY_USB_TYPE_CDP,
  72. POWER_SUPPLY_USB_TYPE_C,
  73. POWER_SUPPLY_USB_TYPE_PD,
  74. POWER_SUPPLY_USB_TYPE_PD_DRP,
  75. POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID
  76. };
  77. /* Input voltage/current limit in mV/mA. Default to none. */
  78. static u16 input_voltage_limit = EC_POWER_LIMIT_NONE;
  79. static u16 input_current_limit = EC_POWER_LIMIT_NONE;
  80. static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
  81. {
  82. return port->port_number >= port->charger->num_usbpd_ports;
  83. }
  84. static int cros_usbpd_charger_ec_command(struct charger_data *charger,
  85. unsigned int version,
  86. unsigned int command,
  87. void *outdata,
  88. unsigned int outsize,
  89. void *indata,
  90. unsigned int insize)
  91. {
  92. struct cros_ec_dev *ec_dev = charger->ec_dev;
  93. struct cros_ec_command *msg;
  94. int ret;
  95. msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
  96. if (!msg)
  97. return -ENOMEM;
  98. msg->version = version;
  99. msg->command = ec_dev->cmd_offset + command;
  100. msg->outsize = outsize;
  101. msg->insize = insize;
  102. if (outsize)
  103. memcpy(msg->data, outdata, outsize);
  104. ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
  105. if (ret >= 0 && insize)
  106. memcpy(indata, msg->data, insize);
  107. kfree(msg);
  108. return ret;
  109. }
  110. static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)
  111. {
  112. struct ec_response_charge_port_count resp;
  113. int ret;
  114. ret = cros_usbpd_charger_ec_command(charger, 0,
  115. EC_CMD_CHARGE_PORT_COUNT,
  116. NULL, 0, &resp, sizeof(resp));
  117. if (ret < 0)
  118. return ret;
  119. return resp.port_count;
  120. }
  121. static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger)
  122. {
  123. struct ec_response_usb_pd_ports resp;
  124. int ret;
  125. ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS,
  126. NULL, 0, &resp, sizeof(resp));
  127. if (ret < 0)
  128. return ret;
  129. return resp.num_ports;
  130. }
  131. static int cros_usbpd_charger_get_discovery_info(struct port_data *port)
  132. {
  133. struct charger_data *charger = port->charger;
  134. struct ec_params_usb_pd_discovery_entry resp;
  135. struct ec_params_usb_pd_info_request req;
  136. int ret;
  137. req.port = port->port_number;
  138. ret = cros_usbpd_charger_ec_command(charger, 0,
  139. EC_CMD_USB_PD_DISCOVERY,
  140. &req, sizeof(req),
  141. &resp, sizeof(resp));
  142. if (ret < 0) {
  143. dev_err(charger->dev,
  144. "Unable to query discovery info (err:0x%x)\n", ret);
  145. return ret;
  146. }
  147. dev_dbg(charger->dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n",
  148. port->port_number, resp.vid, resp.pid, resp.ptype);
  149. snprintf(port->manufacturer, sizeof(port->manufacturer), "%x",
  150. resp.vid);
  151. snprintf(port->model_name, sizeof(port->model_name), "%x", resp.pid);
  152. return 0;
  153. }
  154. static int cros_usbpd_charger_get_power_info(struct port_data *port)
  155. {
  156. struct charger_data *charger = port->charger;
  157. struct ec_response_usb_pd_power_info resp;
  158. struct ec_params_usb_pd_power_info req;
  159. int last_psy_status, last_psy_usb_type;
  160. struct device *dev = charger->dev;
  161. int ret;
  162. req.port = port->port_number;
  163. ret = cros_usbpd_charger_ec_command(charger, 0,
  164. EC_CMD_USB_PD_POWER_INFO,
  165. &req, sizeof(req),
  166. &resp, sizeof(resp));
  167. if (ret < 0) {
  168. dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret);
  169. return ret;
  170. }
  171. last_psy_status = port->psy_status;
  172. last_psy_usb_type = port->psy_usb_type;
  173. switch (resp.role) {
  174. case USB_PD_PORT_POWER_DISCONNECTED:
  175. port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
  176. port->psy_online = 0;
  177. break;
  178. case USB_PD_PORT_POWER_SOURCE:
  179. port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
  180. port->psy_online = 0;
  181. break;
  182. case USB_PD_PORT_POWER_SINK:
  183. port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
  184. port->psy_online = 1;
  185. break;
  186. case USB_PD_PORT_POWER_SINK_NOT_CHARGING:
  187. port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
  188. port->psy_online = 1;
  189. break;
  190. default:
  191. dev_err(dev, "Unknown role %d\n", resp.role);
  192. break;
  193. }
  194. port->psy_voltage_max_design = resp.meas.voltage_max;
  195. port->psy_voltage_now = resp.meas.voltage_now;
  196. port->psy_current_max = resp.meas.current_max;
  197. port->psy_power_max = resp.max_power;
  198. switch (resp.type) {
  199. case USB_CHG_TYPE_BC12_SDP:
  200. case USB_CHG_TYPE_VBUS:
  201. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
  202. break;
  203. case USB_CHG_TYPE_NONE:
  204. /*
  205. * For dual-role devices when we are a source, the firmware
  206. * reports the type as NONE. Report such chargers as type
  207. * USB_PD_DRP.
  208. */
  209. if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole)
  210. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
  211. else
  212. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
  213. break;
  214. case USB_CHG_TYPE_OTHER:
  215. case USB_CHG_TYPE_PROPRIETARY:
  216. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
  217. break;
  218. case USB_CHG_TYPE_C:
  219. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_C;
  220. break;
  221. case USB_CHG_TYPE_BC12_DCP:
  222. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
  223. break;
  224. case USB_CHG_TYPE_BC12_CDP:
  225. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
  226. break;
  227. case USB_CHG_TYPE_PD:
  228. if (resp.dualrole)
  229. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
  230. else
  231. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD;
  232. break;
  233. case USB_CHG_TYPE_UNKNOWN:
  234. /*
  235. * While the EC is trying to determine the type of charger that
  236. * has been plugged in, it will report the charger type as
  237. * unknown. Additionally since the power capabilities are
  238. * unknown, report the max current and voltage as zero.
  239. */
  240. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
  241. port->psy_voltage_max_design = 0;
  242. port->psy_current_max = 0;
  243. break;
  244. default:
  245. dev_err(dev, "Port %d: default case!\n", port->port_number);
  246. port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
  247. }
  248. if (cros_usbpd_charger_port_is_dedicated(port))
  249. port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
  250. else
  251. port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
  252. dev_dbg(dev,
  253. "Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n",
  254. port->port_number, resp.type, resp.meas.voltage_max,
  255. resp.meas.voltage_now, resp.meas.current_max,
  256. resp.meas.current_lim, resp.max_power);
  257. /*
  258. * If power supply type or status changed, explicitly call
  259. * power_supply_changed. This results in udev event getting generated
  260. * and allows user mode apps to react quicker instead of waiting for
  261. * their next poll of power supply status.
  262. */
  263. if (last_psy_usb_type != port->psy_usb_type ||
  264. last_psy_status != port->psy_status)
  265. power_supply_changed(port->psy);
  266. return 0;
  267. }
  268. static int cros_usbpd_charger_get_port_status(struct port_data *port,
  269. bool ratelimit)
  270. {
  271. int ret;
  272. if (ratelimit &&
  273. time_is_after_jiffies(port->last_update +
  274. CHARGER_CACHE_UPDATE_DELAY))
  275. return 0;
  276. ret = cros_usbpd_charger_get_power_info(port);
  277. if (ret < 0)
  278. return ret;
  279. if (!cros_usbpd_charger_port_is_dedicated(port))
  280. ret = cros_usbpd_charger_get_discovery_info(port);
  281. port->last_update = jiffies;
  282. return ret;
  283. }
  284. static int cros_usbpd_charger_set_ext_power_limit(struct charger_data *charger,
  285. u16 current_lim,
  286. u16 voltage_lim)
  287. {
  288. struct ec_params_external_power_limit_v1 req;
  289. int ret;
  290. req.current_lim = current_lim;
  291. req.voltage_lim = voltage_lim;
  292. ret = cros_usbpd_charger_ec_command(charger, 0,
  293. EC_CMD_EXTERNAL_POWER_LIMIT,
  294. &req, sizeof(req), NULL, 0);
  295. if (ret < 0)
  296. dev_err(charger->dev,
  297. "Unable to set the 'External Power Limit': %d\n", ret);
  298. return ret;
  299. }
  300. static void cros_usbpd_charger_power_changed(struct power_supply *psy)
  301. {
  302. struct port_data *port = power_supply_get_drvdata(psy);
  303. struct charger_data *charger = port->charger;
  304. int i;
  305. for (i = 0; i < charger->num_registered_psy; i++)
  306. cros_usbpd_charger_get_port_status(charger->ports[i], false);
  307. }
  308. static int cros_usbpd_charger_get_prop(struct power_supply *psy,
  309. enum power_supply_property psp,
  310. union power_supply_propval *val)
  311. {
  312. struct port_data *port = power_supply_get_drvdata(psy);
  313. struct charger_data *charger = port->charger;
  314. struct cros_ec_device *ec_device = charger->ec_device;
  315. struct device *dev = charger->dev;
  316. int ret;
  317. /* Only refresh ec_port_status for dynamic properties */
  318. switch (psp) {
  319. case POWER_SUPPLY_PROP_ONLINE:
  320. /*
  321. * If mkbp_event_supported, then we can be assured that
  322. * the driver's state for the online property is consistent
  323. * with the hardware. However, if we aren't event driven,
  324. * the optimization before to skip an ec_port_status get
  325. * and only returned cached values of the online property will
  326. * cause a delay in detecting a cable attach until one of the
  327. * other properties are read.
  328. *
  329. * Allow an ec_port_status refresh for online property check
  330. * if we're not already online to check for plug events if
  331. * not mkbp_event_supported.
  332. */
  333. if (ec_device->mkbp_event_supported || port->psy_online)
  334. break;
  335. fallthrough;
  336. case POWER_SUPPLY_PROP_CURRENT_MAX:
  337. case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
  338. case POWER_SUPPLY_PROP_VOLTAGE_NOW:
  339. ret = cros_usbpd_charger_get_port_status(port, true);
  340. if (ret < 0) {
  341. dev_err(dev, "Failed to get port status (err:0x%x)\n",
  342. ret);
  343. return -EINVAL;
  344. }
  345. break;
  346. default:
  347. break;
  348. }
  349. switch (psp) {
  350. case POWER_SUPPLY_PROP_ONLINE:
  351. val->intval = port->psy_online;
  352. break;
  353. case POWER_SUPPLY_PROP_STATUS:
  354. val->intval = port->psy_status;
  355. break;
  356. case POWER_SUPPLY_PROP_CURRENT_MAX:
  357. val->intval = port->psy_current_max * 1000;
  358. break;
  359. case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
  360. val->intval = port->psy_voltage_max_design * 1000;
  361. break;
  362. case POWER_SUPPLY_PROP_VOLTAGE_NOW:
  363. val->intval = port->psy_voltage_now * 1000;
  364. break;
  365. case POWER_SUPPLY_PROP_USB_TYPE:
  366. val->intval = port->psy_usb_type;
  367. break;
  368. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  369. if (input_current_limit == EC_POWER_LIMIT_NONE)
  370. val->intval = -1;
  371. else
  372. val->intval = input_current_limit * 1000;
  373. break;
  374. case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
  375. if (input_voltage_limit == EC_POWER_LIMIT_NONE)
  376. val->intval = -1;
  377. else
  378. val->intval = input_voltage_limit * 1000;
  379. break;
  380. case POWER_SUPPLY_PROP_MODEL_NAME:
  381. val->strval = port->model_name;
  382. break;
  383. case POWER_SUPPLY_PROP_MANUFACTURER:
  384. val->strval = port->manufacturer;
  385. break;
  386. default:
  387. return -EINVAL;
  388. }
  389. return 0;
  390. }
  391. static int cros_usbpd_charger_set_prop(struct power_supply *psy,
  392. enum power_supply_property psp,
  393. const union power_supply_propval *val)
  394. {
  395. struct port_data *port = power_supply_get_drvdata(psy);
  396. struct charger_data *charger = port->charger;
  397. struct device *dev = charger->dev;
  398. u16 intval;
  399. int ret;
  400. /* U16_MAX in mV/mA is the maximum supported value */
  401. if (val->intval >= U16_MAX * 1000)
  402. return -EINVAL;
  403. /* A negative number is used to clear the limit */
  404. if (val->intval < 0)
  405. intval = EC_POWER_LIMIT_NONE;
  406. else /* Convert from uA/uV to mA/mV */
  407. intval = val->intval / 1000;
  408. switch (psp) {
  409. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  410. ret = cros_usbpd_charger_set_ext_power_limit(charger, intval,
  411. input_voltage_limit);
  412. if (ret < 0)
  413. break;
  414. input_current_limit = intval;
  415. if (input_current_limit == EC_POWER_LIMIT_NONE)
  416. dev_info(dev,
  417. "External Current Limit cleared for all ports\n");
  418. else
  419. dev_info(dev,
  420. "External Current Limit set to %dmA for all ports\n",
  421. input_current_limit);
  422. break;
  423. case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
  424. ret = cros_usbpd_charger_set_ext_power_limit(charger,
  425. input_current_limit,
  426. intval);
  427. if (ret < 0)
  428. break;
  429. input_voltage_limit = intval;
  430. if (input_voltage_limit == EC_POWER_LIMIT_NONE)
  431. dev_info(dev,
  432. "External Voltage Limit cleared for all ports\n");
  433. else
  434. dev_info(dev,
  435. "External Voltage Limit set to %dmV for all ports\n",
  436. input_voltage_limit);
  437. break;
  438. default:
  439. ret = -EINVAL;
  440. }
  441. return ret;
  442. }
  443. static int cros_usbpd_charger_property_is_writeable(struct power_supply *psy,
  444. enum power_supply_property psp)
  445. {
  446. int ret;
  447. switch (psp) {
  448. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  449. case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
  450. ret = 1;
  451. break;
  452. default:
  453. ret = 0;
  454. }
  455. return ret;
  456. }
  457. static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
  458. unsigned long host_event,
  459. void *_notify)
  460. {
  461. struct charger_data *charger = container_of(nb, struct charger_data,
  462. notifier);
  463. cros_usbpd_charger_power_changed(charger->ports[0]->psy);
  464. return NOTIFY_OK;
  465. }
  466. static void cros_usbpd_charger_unregister_notifier(void *data)
  467. {
  468. struct charger_data *charger = data;
  469. cros_usbpd_unregister_notify(&charger->notifier);
  470. }
  471. static int cros_usbpd_charger_probe(struct platform_device *pd)
  472. {
  473. struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
  474. struct cros_ec_device *ec_device = ec_dev->ec_dev;
  475. struct power_supply_desc *psy_desc;
  476. struct device *dev = &pd->dev;
  477. struct charger_data *charger;
  478. struct power_supply *psy;
  479. struct port_data *port;
  480. int ret = -EINVAL;
  481. int i;
  482. charger = devm_kzalloc(dev, sizeof(struct charger_data),
  483. GFP_KERNEL);
  484. if (!charger)
  485. return -ENOMEM;
  486. charger->dev = dev;
  487. charger->ec_dev = ec_dev;
  488. charger->ec_device = ec_device;
  489. platform_set_drvdata(pd, charger);
  490. /*
  491. * We need to know the number of USB PD ports in order to know whether
  492. * there is a dedicated port. The dedicated port will always be
  493. * after the USB PD ports, and there should be only one.
  494. */
  495. charger->num_usbpd_ports =
  496. cros_usbpd_charger_get_usbpd_num_ports(charger);
  497. if (charger->num_usbpd_ports <= 0) {
  498. /*
  499. * This can happen on a system that doesn't support USB PD.
  500. * Log a message, but no need to warn.
  501. */
  502. dev_info(dev, "No USB PD charging ports found\n");
  503. }
  504. charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger);
  505. if (charger->num_charger_ports < 0) {
  506. /*
  507. * This can happen on a system that doesn't support USB PD.
  508. * Log a message, but no need to warn.
  509. * Older ECs do not support the above command, in that case
  510. * let's set up the number of charger ports equal to the number
  511. * of USB PD ports
  512. */
  513. dev_info(dev, "Could not get charger port count\n");
  514. charger->num_charger_ports = charger->num_usbpd_ports;
  515. }
  516. if (charger->num_charger_ports <= 0) {
  517. /*
  518. * This can happen on a system that doesn't support USB PD and
  519. * doesn't have a dedicated port.
  520. * Log a message, but no need to warn.
  521. */
  522. dev_info(dev, "No charging ports found\n");
  523. ret = -ENODEV;
  524. goto fail_nowarn;
  525. }
  526. /*
  527. * Sanity checks on the number of ports:
  528. * there should be at most 1 dedicated port
  529. */
  530. if (charger->num_charger_ports < charger->num_usbpd_ports ||
  531. charger->num_charger_ports > (charger->num_usbpd_ports + 1)) {
  532. dev_err(dev, "Unexpected number of charge port count\n");
  533. ret = -EPROTO;
  534. goto fail_nowarn;
  535. }
  536. for (i = 0; i < charger->num_charger_ports; i++) {
  537. struct power_supply_config psy_cfg = {};
  538. port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL);
  539. if (!port) {
  540. ret = -ENOMEM;
  541. goto fail;
  542. }
  543. port->charger = charger;
  544. port->port_number = i;
  545. psy_desc = &port->psy_desc;
  546. psy_desc->get_property = cros_usbpd_charger_get_prop;
  547. psy_desc->set_property = cros_usbpd_charger_set_prop;
  548. psy_desc->property_is_writeable =
  549. cros_usbpd_charger_property_is_writeable;
  550. psy_desc->external_power_changed =
  551. cros_usbpd_charger_power_changed;
  552. psy_cfg.drv_data = port;
  553. if (cros_usbpd_charger_port_is_dedicated(port)) {
  554. sprintf(port->name, CHARGER_DEDICATED_DIR_NAME);
  555. psy_desc->type = POWER_SUPPLY_TYPE_MAINS;
  556. psy_desc->properties =
  557. cros_usbpd_dedicated_charger_props;
  558. psy_desc->num_properties =
  559. ARRAY_SIZE(cros_usbpd_dedicated_charger_props);
  560. } else {
  561. sprintf(port->name, CHARGER_USBPD_DIR_NAME, i);
  562. psy_desc->type = POWER_SUPPLY_TYPE_USB;
  563. psy_desc->properties = cros_usbpd_charger_props;
  564. psy_desc->num_properties =
  565. ARRAY_SIZE(cros_usbpd_charger_props);
  566. psy_desc->usb_types = cros_usbpd_charger_usb_types;
  567. psy_desc->num_usb_types =
  568. ARRAY_SIZE(cros_usbpd_charger_usb_types);
  569. }
  570. psy_desc->name = port->name;
  571. psy = devm_power_supply_register_no_ws(dev, psy_desc,
  572. &psy_cfg);
  573. if (IS_ERR(psy)) {
  574. dev_err(dev, "Failed to register power supply\n");
  575. continue;
  576. }
  577. port->psy = psy;
  578. charger->ports[charger->num_registered_psy++] = port;
  579. }
  580. if (!charger->num_registered_psy) {
  581. ret = -ENODEV;
  582. dev_err(dev, "No power supplies registered\n");
  583. goto fail;
  584. }
  585. /* Get PD events from the EC */
  586. charger->notifier.notifier_call = cros_usbpd_charger_ec_event;
  587. ret = cros_usbpd_register_notify(&charger->notifier);
  588. if (ret < 0) {
  589. dev_warn(dev, "failed to register notifier\n");
  590. } else {
  591. ret = devm_add_action_or_reset(dev,
  592. cros_usbpd_charger_unregister_notifier,
  593. charger);
  594. if (ret < 0)
  595. goto fail;
  596. }
  597. return 0;
  598. fail:
  599. WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret);
  600. fail_nowarn:
  601. dev_info(dev, "Failing probe (err:0x%x)\n", ret);
  602. return ret;
  603. }
  604. #ifdef CONFIG_PM_SLEEP
  605. static int cros_usbpd_charger_resume(struct device *dev)
  606. {
  607. struct charger_data *charger = dev_get_drvdata(dev);
  608. int i;
  609. if (!charger)
  610. return 0;
  611. for (i = 0; i < charger->num_registered_psy; i++) {
  612. power_supply_changed(charger->ports[i]->psy);
  613. charger->ports[i]->last_update =
  614. jiffies - CHARGER_CACHE_UPDATE_DELAY;
  615. }
  616. return 0;
  617. }
  618. #endif
  619. static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL,
  620. cros_usbpd_charger_resume);
  621. static struct platform_driver cros_usbpd_charger_driver = {
  622. .driver = {
  623. .name = DRV_NAME,
  624. .pm = &cros_usbpd_charger_pm_ops,
  625. },
  626. .probe = cros_usbpd_charger_probe
  627. };
  628. module_platform_driver(cros_usbpd_charger_driver);
  629. MODULE_LICENSE("GPL");
  630. MODULE_DESCRIPTION("ChromeOS EC USBPD charger");
  631. MODULE_ALIAS("platform:" DRV_NAME);